题目内容：

This is Jim. He is thirteen. He is from the USA. He is a student. He has a good friend. His name is Jack. Jack is fifteen. He is from Canada. Jack is tall but Jim is short. They are in the same class, but they are in different grades. Jim is in Class Two. Jack is in Class Two, too. They go to school at seven in the morning and go home at six in the afternoon.

根据短文内容，选择正确答案。

1.Jim and Jack are ____.

A. sisters

B. brothers

C. teacher and student

D. from different countries(国家)

2.Jim is ____.

A. short   B. tall    C. strong    D. big

3.Jim and Jack are in ____.

A. the same grade      B. different grades

C. the same color      D. the same family

4.Jack is in ____.

A. Class 4   B. Class 3

C. Class 2   D. Class 1

5.They go to school at ____ in the morning.

A. 6:00   B. 7:00    C. 7:30    D. 8:00